▎ 摘　　要

NOVELTY - C@Bi/rGO electrosorption compound active material comprises reduced graphene oxide and carbon-coated bismuth element particles which are combined in situ on the surface of the reduced graphene oxide. USE - The material is useful for preparing halogen-electrolyzed compound bismuth electrode, electrosorption of halogen ion in a brine (halogen ion is fluorine and/or chlorine, preferably fluorine), reverse voltage for electroanalysis, adsorption separation and enrichment of halide ions in brine (all claimed). ADVANTAGE - The material has good stability and good reversibility and exhibits halogenity in halogen electrosorption. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing C@Bi/rGO electrosorption compound active material, comprising subjecting raw material solution containing bismuth source, graphene oxide, polyvinylpyrrolidone, reducing agent and base to solvothermal reaction at temperature not less than 100 degrees C, washing and drying; and (2) halogen electrodeposited compound bismuth electrode, comprising current collector and an active material layer laminated on the surface, the active material layer contains conductive agent, binder and C@Bi/rGO compound active material; and (3) preparing halogen-electrolyzed compound bismuth electrode, comprising dispersing binder, conductive agent and C@Bi/rGO compound active material using a dispersing agent to obtain slurry, coating the slurry on the surface of the current collector and drying.